Solid-state synthesis and structure of 3-ethoxycarbonylethyltin trichloride with N-saliyldene-4-Br-aniline Schiff base

The title compound (3-EtO2CCH2CH2SnCl3)(2-HOC6H4CH=NC6H4Br-3) 3 was synthesized by solid-state reaction of 3-EtO2CCH2CH2SnCl3 1 with 2-HOC6H4CH=NC6H4Br-3 2 Schiff base at room temperature. It was characterized by m.p., UV-VIS, IR, H-1 NMR and elemental analyses. Its crystal structure was determined by X-ray diffraction analysis with C18H19BrCl3NO3Sn, M-r = 602.29, triclinic, P (1) over bar, a = 7.750(16), b = 10.578(2), c = 13.936(3) Angstrom, alpha = 83.663(3). beta = 75.909(3), gamma = 76.691(3)degrees, V = 1077(4) Angstrom(3), Z= 2, D-c = 1.858 g/cm(3), F(000) = 588, mu = 3.433 mm(-1), R = 0.0547 and wR = 0.1341 for 4122 observed reflections (I > 2sigma(I)). The phenolic O atom of the Schiff base is coordinated to the central Sn atom, and the intramolecular hydrogen bonds in this Schiff base are reinforced when the complex forms. Two possible resonance formulas of 3 are suggested. The central Sn atom is coordinated by three Cl, one C and two O atoms, resulting in a distorted octahedron.